Means for reproducing maps and the like.



E. ABEBLE. MEANS FOR REPRODUGING MAPS AND THE LIKE.

APPLICATION FILED JAN. 9, 1906.

Patented NOV. 10, 1908.

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EDWARD ABERLE, OF NEW YORK, N. Y.

MEANS FOR REPRODUCING MAPS AND THE LIKE.

Specification of Letters Patent.

Patented Nov. 10, 1908.

Application filed January 9, 1906. Serial No. 295,242.

To all whom it may concern:

Be it known that I, EDWARD ABERLE, a citizen of the United States, andresident of the borough of Brooklyn, county of Kings, city and. rtate ofNew York, have invented certain new and useful Improvements in Maps andthe Like, of which the ollowing is a specification.

My invention relates to the production of maps, charts, plans and thelike, particularly for reproduction by photography and lithographic orother printing.

The object of my present invention is to provide a means of thischaracter which will present special advantages as to ease of makingcorrections, clearness of drawing, and perfect registry of therespective portions of the map.

' The invention will be fully described hereinafter, and the features ofnovelty pointed out in the appended claim.

Reference is to be had to the accompanying drawing, in which Fi ure 1.1s a face view showing one side of the s eet used in my invention; Fig.'2 is a face view of the reverse side of the sheet; Fig. 3 is a faceview showing in full lines the matter on the obverse side of the sheetand in dotted lines the matter on the reverse thereof, and Fi 4 is apartialcross-section on line 44 of ig. 3.

In carrying out -my invention I employ a single unitary sheet ofmaterial which is sufliciently pervious to light for the purposehereinafter indicated and preferably I take a sheet of transparentmaterial, such as cel- A, of this said sheet, which I will call theobverse, I draw, print or produce otherwise certain portions of the mapor chart, as for instance the names of States, towns, rivers and othergeographical features, and other words. Fig. 1 shows the obverse side Aof the sheet with a number of names so produced thereon. These names areplaced in their proper relative posi- On the other side of the sheet 13,which I will call the reverse I produce such other indications as willcomplete the map when coupled with the indications contained on the faceA. Thus in Fig. 2 the reverse contains the coast line and also linesindicating rivers, railroads, the location of towns and certaindistinguishingfeatures of such railroads. Fig. 3 represents theappearance of the transparent sheet after the two sides or faces thereofhave been worked upon as above described. The matter on the obverse hasbeen shown in full lines and the matter on the reverse has beenindicated in dotted lines. In Figs. 1 and 2 I have shown only the matterwhich appears on each of the respective sides, so as to avoid confusion.By reference to Figs. 2 and 3 it will be understood that the matter onone face of the sheet is drawn reversed with reference to the appearancesuch matter has in the completed map. Thus the coast line in theneighborhood of the city of Galveston appears in the lower left handcorner of Fig. 2, while in the completed map this coast line is in thelower right hand corner, as will be seen in Fig. 3. The map having thusbeen produced on the sheet the lines and other indications aretransferred upon stone, metal or other suitable surface by the action 0light according to any approved process of reproduction. In view of thisit will be understood that the sheet need not be absolutely transparent,but it will be suflicient if the sheet is pervious to light to a degreeallowing the matter on both sides of the sheet to be transferred to alight-sensitive surface at the same time, by one exposure.

The advantages of my present invention are as follows: Inasmuch asvarious features of the map are on different sides of the sheet, I avoidthe crowding of lines andintersection of features which would occur ifthe entire matter were drawn on the same side of the sheet; theprocedure described therefore facilitates the production of clean work.Furthermore should corrections be required they can be made much morereadily since matter can be erased from one side of the sheet withoutaffecting the matter on the other side of the sheet; if, however, theentire matter were on one side it will be 0 vious that in many cases itwould be impossible to erase say the name of a locality without at thesame time erasing a line indicating a railroad or river or other featureof the map. In addition to this, while one side of the sheet bears thenames of localities and of other features, these names remainpermanently in proper relation to the corresponding features, as thereis no danger of the matter on one side shifting with reference to thematter on the other side When the sheet is made of perfectly transparentmaterial, as I prefer to have it, the production of the map is gards theplacing 0 the two portions of the map in their proper. relation on thetwo sides of the sheet.

I claim as my invention As a means for reproducing maps and the i like,an integral sheet of material pervious to light, bearing on its obversethe names of localities, rivers and other geographical fea- 10 tnres,and on its reverse the representations eatly facilitated as re-- of suchfeatures in proper relation to the names on the obverse of the sheet.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EDWARD ABERLE.

Witnesses: 1 JOHN LOTKA, JOHN A. KEHLENBEOK.

